Added class and os alternates

.oh-my-zsh/plugins/transfer/README.md

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+# `transfer` plugin
+
+[`transfer.sh`](https://transfer.sh) is an easy to use file sharing service from the command line
+
+## Usage
+
+Add `transfer` to your plugins array in your zshrc file:
+```zsh
+plugins=(... transfer)
+```
+
+Then you can:
+
+- transfer a file:
+
+```zsh
+transfer file.txt
+```
+
+- transfer a whole directory (it will be automatically compressed):
+
+```zsh
+transfer directory/
+```